Working out how many financial years a date range falls into

I have a very simple spreadsheet. Let's say Column A has the start date of when a project started, and Column B is an end date. I want to work out how many financial years those dates cover. Something like below. Struggling to work out the maths behind it on this one.

A financial year is the 1st of April to 31st of March. The dates below are in DD/MM/YYYY